Furnace.



No. 807,890. PATENTED DEC. 19, 1905. G. WATSON & H. W. MASON.

FURNACE.

APPLICATION FILED JUNE 27, 1905.

5 SHEETS-SHEET 1.

No. 807,890. PATENTED DEC. 19, 1905. G. WATSON & H. W. MASON.

FURNACE.

APPLICATION FILED JUNE 27, 1905.

5 SHEETS-SHEET 2.

\ earg-e 7155x0711 No. 807,890. v PATENTED DEC. 19, 1905. G. WATSON & H. W. MASON.

FURNACE.

APPLICATION FILED JUNE 27, 1905.

5 SHEETS-SHEET s.

"mum:

7222 5565: Y 7[e)zry 71021680 5 SHEETS-SHEET 4.

No. 807,890. PATENTED DEC. 19, 1905. G. WATSON &: H. W. MASON.

FURNACE.

APPLICATION FILED JUNE27,1905.

No. 807,890. PATENTED DEC. 19, 1905.

G. WATSON & H. W. MASON. FURNACE.

APPLICATION FILED JUNE 27,1905.

5 SHEETS-SHEBT 5.

, 7206 fans: @019? 77665010 enry 721% saw rrnn sragns PATENT FFTOE.

GEORGE TVATSON, OF POOL, NEAR LEEDS, AND HENRY WILLIAM MASON, OF VAKEFIELD, ENGLAND, ASSIGNORS TO HORSFALL DESTRUCTOR CO, LIMITED, OF LEEDS, ENGLAND.

FURNACE.

Specification of Letters Patent.

Patented Dec. 19, 1905.

T0 at whom it In/my concern.-

Be it known that we, GEORGE WATSON, a resident of Pool, near Leeds, and HENRY \VIL- LIAM Mason, a resident of Wakefield, England, subjects of the King of Great Britain, have invented a new and Improved Furnace, of which the following is a full, clear, and exact description.

Our invention relates to furnaces, and more particularly to those adapted for the destruction of refuse. Its principal objects are to provide eflicient means for furnishing a forced draft to the furnace, means for protecting the metal parts from burning out, and also the provision of a convenient ash-pit.

Reference is to be had to the accompanying drawings, which form a part of this specification, in which similar reference characters designate corresponding parts in the several views.

Figure 1 is an irregular vertical transverse section through a double battery of furnaces to which one embodiment of our invention is applied. Fig. 2 is a front elevation thereof, one of the furnaces being shown. in section. Fig. 3 is a vertical transverse section through a single furnace, taken on the line 8 3 of Fig. 4:. Fig. A is a longitudinal section of said furnace on the line at 4: of Fig. 3. Fig. 5 shows a section on the line 5 5 of Fig. 4. Fig. 6 is a side elevation of one of the draft-boxes looking at its inner face. Fig: 7 is a section therethrough on the line 7 7 of Fig. 6. Fig. 8 is a vertical transverse section on the line 8 8 of Fig. 6. Fig. 9 is a transverse section on line 9 9 of Fig. 10 of a modification, the front of an adjacent furnace of the battery being shown therein. Fig. 10 is a longitudinal section on line 10 10 of Fig. 9, and Fig. 11 is a section on the line 11 11 of Fig. 10.

i/Ve have here illustrated our invention in connection with a double battery of furnaces situated back to back and each furnace comprising a combustion-chamber 10, to which i delivers a feed-throat 11, having a closure 12. Across the furnace extends a grate 13, having below it an ash-pit 14. The combustionchamber is of preferably greater width than the grate, the arch 15 of said chamber terminating at some distance at each side of the grate. Located adjacent to the grate at each side below the bases of the arch are -draft boxes 16, set in the structure of the furnace,

and each having an inner vertical wall 17, a 28.

horizontal bottom wall 18, and a rearwardly and upwardly inclined top wall 19, which overhangs the bottom at 20. Each box has an upper and lower section 21 and 22, respectively, they being divided from one another by a longitudinal partition 23, extending from the inner side of the overhang parallel to the top wall and terminating at some distance from the opposite extremity of the box. The inner face of the section 22, which is situated above the grate, is covered by removable plates 24:, these furnishing an inclined wall connecting the base of the arch at that side with the grate.

The section 22 of each box is connected with the ash-pit through openings 25 and with the upper section 21 through the opening at the end of the partition. \Vith the overhanging part communicates a draft duct or conduit 26, running longitudinally of each battery at the inner side of the furnace. The draft-ducts may be accessible through openings formed in their inner walls, which extend at the rear of the ash-pit, these openings being normally closed by doors 27. The passage of air or steam from the ducts into the draft-boxes is preferably controlled by a valve 28, pivoted at one side of the section 21 adjacent to the overhang and operated by a rod 29, extending through the boxes and out at the front of the furnaces, where itis provided with a handle I 29. From the bottom wall of each box at the side toward the ash-pit a flange 30 projects upwardly, so that the section 22 is adapted to contain a liquid. Doors 31 and 32 at the front of each furnace give access to the combustion-chamber and ash-pit, respectively, said ash-pit preferably having an inclined bottom 38 sloping from the rear toward the door to facilitate the withdrawal of the ashes.

In using the furnaces the substances to be destroyed are introduced into the feed-throats and fall upon the fire supported upon the grate. Air .under pressure with or without steam is, applied to the draft-ducts and passes into the sections 21 of the draft-boxes beneath the plates 24, which are cooled thereby, so that they will be rendered much more durable. From the upper section the forced draft enters the lower and escapes through the openings 25 into the ash-pit, from which it rises through the'grate to increase combustion. The supply is controlled to secure the proper results by opening or closing valves ater is fed into the sections 22 of the the influence of the fire.

boxes and maintained at the desired level, the air heated by its contact with the plates 2 L passing over this water to escape through the opening 25. In so doing it takes up the moisture necessary to protect the metal portions of the furnaces which are subjected to When the plates 24, which, with the grate-bars, are most liable to burn out, become unfit for further service, they may be readily removed and others supplied.

In Figs. 9 to 11 of the drawings another form of the invention is shown, in which the draft-boxes may be substantially the same as those previously described, except that the flanges 30 are omitted. The ash-pits 14c of the furnaces are also so constructed as to be adapted to contain a liquid into which the unburned material will fall after passing between the grate-bar s. The height of the liquid in the ash-pit is preferably such that a portion of it will be contained within sections 22 of the boxes, so that dry air, if used, will in passing over it take up a certain amount of moisture to secure the results previously stated. Each ash-pit preferably has an upwardly-inclined front wall 35, which extends beyond the front wall of the furnace to leave a space provided with a door or closure 36, hinged to the furnace. From a horizontal wall 37, which projects inwardly over the ash-pit, depends a flange 38, closing the upper portion of said ash-pit and dipping into the contained liquid. This prevents the draft from escaping beneath the door 36 or through the opening when this'door is raised, the extent to which the flange dips in the liquid being such that a column of water is formed sufficient to balance the pressure of the blast.

Having thus described our invention, We claim as new and desire to secure by Letters Patent 1. A furnace provided with draft-boxes located in the side walls of the furnace and having portions extending below the grate, the portions below the grate being adapted to contain water and provided with openings in communication with the ash-pit, and a conduit connected with the said boxes.

2. A furnace provided with draft-boxes located in its side walls andhaving portions projecting below the grate, the portions below the grate being adapted to contain water and provided with openings in communication with the ash-pit,aconduit connected with the boxes, and avalve controlling the communication between the conduit and each box.

3. A furnace having an arch and provided with draft-boxes having upper and lower communicating sections and located in the side walls below the base of the arch with the lower section projecting below the grate, said lower sections being adapted to contain water and provided with openings in communication with the ash-pit, a conduit connected with the upper sections of the boxes, and a valve for controlling the communication between the conduit and the upper section of each box.

4:. A furnace having an arch and provided with inclined draft-boxes having upper .and lower communicating sections and located in the side walls below the base of the arch, the upper sections having inclined inner walls and the lower sections projecting below the grate and provided with openings in communication with the ash pit, said lower section being adapted to contain Water, a conduit connected with the upper sections of the boxes, and valves for controlling communication between the conduit and the upper sections of the boxes.

5. A furnace comprising a grate, a draftbox, and an ash-pit situated below the grate and into which the draft-box opens, said draftbox and ash-pit being adapted to contain liquid.

6. A furnace comprising a grate, a draftbox situated adjacent thereto and projecting below the same, and an ash-pitinto which the draft-box opens, said ash-pit and draft-box being adapted to contain liquid.

7. A furnace comprising a grate, a draftbox projecting below the grate, an ash-pit situated below the grate and into which the draft-box opens, said ash-pit and draft-box being adapted to contain liquid, the ash-pit having an opening above the liquid-level, and a member extending below the liquid-level between the grate and the opening from theash-pit. 8. A furnace having an arch and provided with draft-boxes having upper and lower communicating sections and located in the side walls below the base of the arch with thelower sections projecting below the grate and in cornmunication with the ash-pit, the upper section having inclined inner upper walls, removable plates on the inclined walls of the upper section and connecting the base of the archwith the grate, and a conduit in communication with the said boxes.

9. A furnace provided in its side walls with draft-boxes, each box having an overhanging portion at its inner end and divided into upper and lower sections by a partition extending from the overhanging portion and terminating short of the outer end of the box, a valve hinged to one side of the upper section adjacent to the overhanging portion of each box, rods secured to the valves and extending out through the front of the furnace, and a conduit communlcatlng with the overhanging portions of said boxes.

In testimony whereof we have signed our names to this specification 1n the presence of two subscribing witnesses.

GEORGE WATSON. HENRY WILLIAM MASON.

Witnesses:

CHARLES FRANKLAND DENT, WILSON BRAITHWAITE. 

